HW4_Spring2008 - ISE 3214 Spring 2008 Facilities Planning...

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ISE 3214 Spring 2008 Facilities Planning and Material Handling Homework 4 Question Possible Points Your Points 1 20 2 14 3 36 4 30 Total 100 You may work with a classmate for this assignment (max group size=2) Please copy the table above and paste on the first page of your assignment. The assignment should be submitted according to assignment submission rules. 1. SKU X, Y and Z will be stored in the warehouse where you are just hired as an industrial engineer. Daily requirements for storage locations follow Poisson distributions with corresponding parameters X = 20, Y = 10 and Z = 30. Items X and Y generally ordered together, therefore the warehouse management has decided to store them together as a single class, say C 1 while item C will form its own class, to be called C 2. a. Determine the number of storage locations N 1 and N 2 to be allocated to these two classes so that the warehouse operational service level i.e., the probability that the warehouse will not experience a storage shortage at any given day - is at least 0.95, while the employed total storage space is minimized. b. Compare the total number of locations determined above to the minimal number of locations that would provide a service level of 95% under randomized storage. c. Do you think that the information provided above is adequate for determining a storage layout for these two classes - i.e., the detailed assignment of the available storage locations to them - or not?
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6 4 4 2 2 3 2. Assume that you have a double-deep pallet rack with 4 tiers that holds three pallets wide. Pallets sit on rails on the all of the three tiers and there is not a rail across the top. The rails, top and side, are all 2” wide, 4” separate the load from the side rails and between loads, and there is 3” between the top of a load and the rail above it. (Refer to the drawing below showing front view of one tier). With respect to the depth , there are 3” in between the back and front loads. The load dimensions are in the following picture.
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